Hagon Progressive fork springs - opinons?

[Nick_69]

Been looking round the Internet for some progressive folk spring and i was wondering what people think of these http://www.intobikes.co.uk/products/001109/007111/Hagon_Products_Progressive_Fork_Springs_suitable_f or_Suzuki_SV650_S_2008?mn=0126&pt=0086

also it say 2008 model and i have got a K9 but im pretty sure that they will fit a K9 coz the only changes were cosmetic

[yorkie_chris]

Folk springs? Do they sound like banjos?

[barwel1992]

the will fit and seem to be a good although i would not fit them, id rather have linear springs for my weight

[Nick_69]

the will fit and seem to be a good although i would not fit them, id rather have linear springs for my weight

Cheers they sld be fine for my weight as im only 12stone

What weight oil do you think 10w or 15w

[TazDaz]

I'm a heavy sod and I've noticed a bit of difference. For starters I don't feel the need to have preload set on max.

[barwel1992]

i think maxton prog use 15w but not sure

[metalhead19]

I have 10W in mine, and was talking to RickT i think it was and was saying maybe 15W would be better as its thicker

[Dave20046]

Hagon recommend 10w only. I had 15w in my curvy and it was a bit too much, 10w on the pointy was lovely.
Have heard linear are better but I'm a similar weight to you (honest :smt053: ) and found the hagons to be fine. Couldn't ride the bike without them.

[AirArmed]

whats the differesnce between progressive and linear? i find my forks dive under heavy breaking but if i up the preload they are too hard for normal riding and shake my wrists. i only weight 9 stone!

[Dave20046]

linear are the same rate all the way down the range of the spring, progressive are progressive in that they have two rates (imagine the spring looser coils moving tighter down the spring)...

... I think... I ain't too smart.

[TazDaz]

SpannerMan said he only uses what Hagon recommend, which is 10w.

Dave, was it you that I heard used 15w and it was like forks of concrete?

[Dave20046]

SpannerMan said he only uses what Hagon recommend, which is 10w.

Dave, was it you that I heard used 15w and it was like forks of concrete?

yep forks o' concrete was the phrase, :shaking2: was the face. In fairness they weren't tooo bad at first but I lost a wee bit of weight and they got worse. Don't get me wrong, better than standard for throwing round corners but it wasn't great a recovering from potholes or shakes and you could feel everything through the bars.
I think the damping can't handle 15w or something. 10w was spot on on the pointy, track tested on 'choppy as fook' mallory too.

[yorkie_chris]

linear are the same rate all the way down the range of the spring, progressive are progressive in that they have two rates (imagine the spring looser coils moving tighter down the spring)...

... I think... I ain't too smart.

Yea, though you seem to be describing dual rate there.

Linear, for example 1kg/mm to keep the math easy needs 1 kg of force to compress the spring 1mm.
So compress it 10mm using 10kg. To compress it another mm needs 11kg.

Progressive change the rate depending on position. So to compress it 10kg may need 10kg. To compress it another mm may need 1.5kg.

So for me I would want springs of .85kg/mm. If fitting progressives you may end up with a rate starting at .7 moving up to 1.0. But they do not tell you this information!!


The idea of progressive is to apply a "one size fits all" solution. Of course, suzuki try this, and fail.

I do not think it is the best solution. I think it makes for a fork which exhibits no control over pitch or support on initial braking as it is too soft in initial part and cannot be set up for rebound properly (with oil weight).

I think linear springs matched to your weight are the more effective solution.

[Dave20046]

I think linear springs matched to your weight are the more effective solution.

Agree with that but my only concern is what if you decide being a pie-munching lazy barsteward is the best way to survive the winter months without having to shell out on proper kit :D
How sensitive are they to weight gain/loss?

Is 'still better than prog. , lardarse' the answer?

[barwel1992]

the springs for my weight are .95kg/mm and cover weights about 1/2 stone ontop or below my weight so are quite versatile to weight change

[maviczap]

Hagon recommend 10w only. I had 15w in my curvy and it was a bit too much, 10w on the pointy was lovely.
Have heard linear are better but I'm a similar weight to you (honest :smt053: ) and found the hagons to be fine. Couldn't ride the bike without them.

+1 15w was too heavy with my Hagon springs

[yorkie_chris]

Agree with that but my only concern is what if you decide being a pie-munching lazy barsteward is the best way to survive the winter months without having to shell out on proper kit :D
How sensitive are they to weight gain/loss?

Is 'still better than prog. , lardarse' the answer?

The front isn't that sensitive once it is working. A few stone either way.

I don't feel the need to change front springs when 2-up, rear spring OTOH is noticeable.

[skeetly]

Cheers they sld be fine for my weight as im only 12stone

What weight oil do you think 10w or 15w

I fitted them to my k3 and then did a trackday at Oulton park and couldn't believe the difference.
I'm about 12 stone.
I did have a gsxr600 shoc on the back too.
Just use the oil hagon send out with the springs.

[AirArmed]

where is that best place to get hold of some springs then?

[Spanner Man]

Good morning all.


In my opinion Hagon springs are the best 'out of the box' mod one can do to the front end. Other springs may perform better under certain circumstances, (track days etc), but Hagons are designed to impove an otherwise standard bike. Hence they seem to suit riders of considerably varying weight, with no other modifications required.
Always use Hagons recommended oil weight, & oil level.


Cheers.

[metalhead19]

where is that best place to get hold of some springs then?

I got my set from banditmania. Would recommend them.

[yorkie_chris]

(track days etc)

The etc. being going fast on the road ;)

I cannot name a single circumstance where a progressive spring works better than a linear one.

[thedonal]

Got some in mine- fitted by Spanner Man to Hagon's specs for oil.

I'm 14 stone and they work a treat- SERIOUSLY improved on the standard (probably well knackered) shocks on my Curvy.

The front end is FAR more stable and confidence inspring during braking and cornering.

[madness]

I've got Hagons fitted in mine and they are an improvement over standard. I would have gone for linears, but due to being a lightweight, I couldn't source the correct rate for my weight. One thing I will say is, don't expect the Hagons to solve all your handling issues.

[badsaboy]

im 14 stone/90kilo's. which type of springs should i go for?

[barwel1992]

^ id say linear but id say that even if you were 2 stone, because i like the way they are for your weight and not a comprimise (something for every one)

[andrewsmith]

badsa spec wise try to get 0.9kg/mm linea.
K-tech, ohlins etc do springs to suit.

[barwel1992]

^+1 i used a .95kg/mm spring and that was good for my weight (16.5stone) so a .9kg/mm should be ok

[Sally]

I have 0.9kg/mm springs and 20W oil and the front end is still waaaay too soft.

Maybe am just a fat bar steward :)